Project Musings

The Works of Steven Green

Assembly of version 1.2 of IoT sensor

I've updated my web-site to display my IoT temperature sensor data. Currently there is only one sensor, but I have materials to make two more boards. I expect to have more boards fabricated so I can locate them around the home.

A Grav PHP plugin was written to load the sensor data from a MySQL dat...

Assembly of version 1.2 of IoT sensor

Although looking a little ugly, I finally have a working IoT temperature sensor. I had put it down for a time, but returned to this project in January.

The board now:

  • wakes from deep sleep
  • measures the thermistor temperature via an ADC
  • connects to my LAN via wifi
  • posts a "rest" message t...
Assembly of version 1.1 of IoT sensor

I completed assembly of V1.1 of the sensor board. This version revised the power circuitry.

I applied techniques learned from the first version's assembly.

I placed the BGA power IC first. A thin layer of flux was applied to fix it to the board. Then the remaining SMT parts were placed. The boar...

Design of version 1.1 of my IoT sensor

I got cocky with the second step in my temperature sensor project, IoT Plan.

I assumed I finished the design of the power circuit, in retrospect I must have set it down to return to later. I did not connect all the required pins for the power IC and designed a new version. Hopefully the next tim...

Fabricating my first temperature sensor board.

I have fabricated a wifi temperature sensor for my IoT project, IoT Plan.

The sensor board uses an ESP32 module for its core functionality: controller, wifi and temperature sensor. I paired it with a buck-boost voltage regulator that can be supplied by battery (3V) or micro-usb (5V) source. A 4-...

We live in a house built in the 60's, and we close off some rooms we rarely use to conserve energy. This year we have been tracking temperatures due to the installation of a new heating system. Wanting to collect more detailed measurements, I am creating a sensor network to collect temperatures auto...